transaction
... amount of concurrency they allow and the amount of overhead that they incur. Some schemes allow only conflict-serializable schedules to be generated, while others allow viewserializable schedules that are not conflictserializable. ...
... amount of concurrency they allow and the amount of overhead that they incur. Some schemes allow only conflict-serializable schedules to be generated, while others allow viewserializable schedules that are not conflictserializable. ...
McAfee Database Activity Monitoring 5.1.1 Release Notes About this release
... Recommended — McAfee recommends this release for all environments. This update should be applied at the earliest convenience. For more information about patch ratings, see McAfee KnowledgeBase article KB51560. ...
... Recommended — McAfee recommends this release for all environments. This update should be applied at the earliest convenience. For more information about patch ratings, see McAfee KnowledgeBase article KB51560. ...
Topics-Ch4Ch5
... Redundancies in a table may result in errors or inconsistencies (called anomalies) when a user attempts to update the data in the table. There are three types of data anomalies: • Insertion anomaly – Suppose we need to add a new employee to EMPLOYEE2. Since the primary key is (EmpID, Course), to ins ...
... Redundancies in a table may result in errors or inconsistencies (called anomalies) when a user attempts to update the data in the table. There are three types of data anomalies: • Insertion anomaly – Suppose we need to add a new employee to EMPLOYEE2. Since the primary key is (EmpID, Course), to ins ...
Semantic Web Repository And Interfaces
... Due to performance optimization we had to implement a cache for inserted triples into the import interface. The cache is usable in data stores based on both relational database and other data stores with remote access. In case of relational database based data store, it is better to insert triples i ...
... Due to performance optimization we had to implement a cache for inserted triples into the import interface. The cache is usable in data stores based on both relational database and other data stores with remote access. In case of relational database based data store, it is better to insert triples i ...
Chapter 21:Application Development and
... Intraprogram: only during execution of a single program or query ...
... Intraprogram: only during execution of a single program or query ...
SQL Query Dissembler –A Self Optimizing Autonomic
... breaks up a large query into a set of equivalent smaller queries is discussed in detail. Our experiments show that concurrent execution of large resource-intensive queries can have significant impact on the performance of other workloads, especially as the points of contention between the workloads ...
... breaks up a large query into a set of equivalent smaller queries is discussed in detail. Our experiments show that concurrent execution of large resource-intensive queries can have significant impact on the performance of other workloads, especially as the points of contention between the workloads ...
2. SDMX Istat framework
... statistical data, from data collection to data dissemination. So Data and Metadata dissemination are currently located in different database maintained by different production Directorates. To access these sub-systems, users must use navigation interfaces that are completely different from each othe ...
... statistical data, from data collection to data dissemination. So Data and Metadata dissemination are currently located in different database maintained by different production Directorates. To access these sub-systems, users must use navigation interfaces that are completely different from each othe ...
Sedna: native XML database management system (internals overview)
... disk and main memory, and the transaction manager that provides concurrency control facilities. ...
... disk and main memory, and the transaction manager that provides concurrency control facilities. ...
SQLSaturday_Slide_Deck_Rohan
... Why we need to backup databases? • Database architecture helps to keep track of changes. • Everything in life can fail • Disaster can happen at anytime • Backup helps to move the database • Using backups we initiate other SQL Server disaster recovery features such as the log shipping, replication a ...
... Why we need to backup databases? • Database architecture helps to keep track of changes. • Everything in life can fail • Disaster can happen at anytime • Backup helps to move the database • Using backups we initiate other SQL Server disaster recovery features such as the log shipping, replication a ...
How to Effectively Monitor MySQL Servers Share:
... All of the dashboards in SAM are fully customizable and you can edit them to retrieve any performance metric and counter as required. By default, SolarWinds SAM uses its out-of-the box ODBC User-Experience Monitor that is applied to the MySQL template to monitor the performance of your MySQL server. ...
... All of the dashboards in SAM are fully customizable and you can edit them to retrieve any performance metric and counter as required. By default, SolarWinds SAM uses its out-of-the box ODBC User-Experience Monitor that is applied to the MySQL template to monitor the performance of your MySQL server. ...
Creating and Deleting Many User Roles for the MDM Hub
... Creating Roles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ...
... Creating Roles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ...
jhtp5_23
... (sun.jdbc.odbc.JdbcOdbcDriver). This driver typically requires the ODBC driver to be installed on the client computer and normally requires configuration of the ODBC data source. The bridge driver was introduced primarily for development purposes and should not be used for production applications. ...
... (sun.jdbc.odbc.JdbcOdbcDriver). This driver typically requires the ODBC driver to be installed on the client computer and normally requires configuration of the ODBC data source. The bridge driver was introduced primarily for development purposes and should not be used for production applications. ...
Database System Concepts and Architecture
... The three-schema architecture is a convenient tool with which the user can visualize the schema levels in a database system. Most DBMSs do not separate the three levels completely and explicitly, but support the three-schema architecture to some extent. Some older DBMSs may include physical-level de ...
... The three-schema architecture is a convenient tool with which the user can visualize the schema levels in a database system. Most DBMSs do not separate the three levels completely and explicitly, but support the three-schema architecture to some extent. Some older DBMSs may include physical-level de ...
jhtp5_23 - IC
... (sun.jdbc.odbc.JdbcOdbcDriver). This driver typically requires the ODBC driver to be installed on the client computer and normally requires configuration of the ODBC data source. The bridge driver was introduced primarily for development purposes and should not be used for production applications. ...
... (sun.jdbc.odbc.JdbcOdbcDriver). This driver typically requires the ODBC driver to be installed on the client computer and normally requires configuration of the ODBC data source. The bridge driver was introduced primarily for development purposes and should not be used for production applications. ...
RDF Objects
... RDF using blank nodes. Instead of being identified by a URI, they can be identified by their unambiguous properties. These properties can be determined from OWL and DAML ontologies. An application wanting to query a database for information about a person will need to identify that person by their u ...
... RDF using blank nodes. Instead of being identified by a URI, they can be identified by their unambiguous properties. These properties can be determined from OWL and DAML ontologies. An application wanting to query a database for information about a person will need to identify that person by their u ...
Distributed Database Systems
... waiting for the response, holds on to other locks! – If sites or links fail, Xact cannot commit until they are back up. – Even if there is no failure, committing must follow an expensive commit protocol with many msgs. ...
... waiting for the response, holds on to other locks! – If sites or links fail, Xact cannot commit until they are back up. – Even if there is no failure, committing must follow an expensive commit protocol with many msgs. ...
Distributed Databases
... Observations on 2PC Ack msgs used to let coordinator know when it can “forget” an Xact; until it receives all acks, it must keep T in the Xact Table. If coordinator fails after sending prepare msgs but before writing commit/abort log recs, when it comes back up it aborts the Xact. If a subtrans ...
... Observations on 2PC Ack msgs used to let coordinator know when it can “forget” an Xact; until it receives all acks, it must keep T in the Xact Table. If coordinator fails after sending prepare msgs but before writing commit/abort log recs, when it comes back up it aborts the Xact. If a subtrans ...
relational database
... In our relational database, we broke our list into several tables. Somehow the tables must be joined back together. In a relational database, tables are joined together using the value of the data. If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value sto ...
... In our relational database, we broke our list into several tables. Somehow the tables must be joined back together. In a relational database, tables are joined together using the value of the data. If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value sto ...
Slides
... Exactly one copy of a relation is designated the primary or master copy. Replicas at other sites cannot be directly updated. – The primary copy is published. – Other sites subscribe to (fragments of) this relation; these are secondary copies. Main issue: How are changes to the primary copy propagate ...
... Exactly one copy of a relation is designated the primary or master copy. Replicas at other sites cannot be directly updated. – The primary copy is published. – Other sites subscribe to (fragments of) this relation; these are secondary copies. Main issue: How are changes to the primary copy propagate ...
Topic 5 - Murdoch University
... objects and operations. Each database sublanguage is a combination of two languages: a data definition language (DDL) which provides facilities for defining database objects a data manipulation language (DML) which provides features for specifying the processing to be performed on database objec ...
... objects and operations. Each database sublanguage is a combination of two languages: a data definition language (DDL) which provides facilities for defining database objects a data manipulation language (DML) which provides features for specifying the processing to be performed on database objec ...
The Design of a Robust Persistence Layer For Relational
... encapsulates the behavior needed to store objects in persistence mechanisms such as object databases, files, and relational databases. By conforming to this class-type architecture the robustness of your source code increases dramatically due to reduced coupling within your application. Figure 4 sho ...
... encapsulates the behavior needed to store objects in persistence mechanisms such as object databases, files, and relational databases. By conforming to this class-type architecture the robustness of your source code increases dramatically due to reduced coupling within your application. Figure 4 sho ...
Versant Object Database
Versant Object Database (VOD) is an object database software product developed by Versant Corporation.The Versant Object Database enables developers using object oriented languages to transactionally store their information by allowing the respective language to act as the Data Definition Language (DDL) for the database. In other words, the memory model is the database schema model.In general, persistence in VOD in implemented by declaring a list of classes, then providing a transaction demarcation application programming interface to use cases. Respective language integrations adhere to the constructs of that language, including syntactic and directive sugars.Additional APIs exist, beyond simple transaction demarcation, providing for the more advanced capabilities necessary to address practical issues found when dealing with performance optimization and scalability for systems with large amounts of data, many concurrent users, network latency, disk bottlenecks, etc.